/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInstanceConstant.h
void SetScalarParameterAtlasEditorOnly ( const [FMaterialParameterInfo](API\Runtime\Engine\FMaterialParameterInfo) & ParameterInfo, [FScalarParameterAtlasInstanceData](API\Runtime\Engine\Materials\FScalarParameterAtlasInstanceDat-) AtlasData )